20647600

素因数分解:

$2^4\times 5^2\times {\mathrm{41}}^1\times {\mathrm{1259}}^1$

素因数の和:1318

約数の個数: 60

約数和(自身を含む): 50856120

約数和(自身を除く): 30208520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 41, 50, 80, 82, 100, 164, 200, 205, 328, 400, 410, 656, 820, 1025, 1259, 1640, 2050, 2518, 3280, 4100, 5036, 6295, 8200, 10072, 12590, 16400, 20144, 25180, 31475, 50360, 51619, 62950, 100720, 103238, 125900, 206476, 251800, 258095, 412952, 503600, 516190, 825904, 1032380, 1290475, 2064760, 2580950, 4129520, 5161900, 10323800, 20647600]

約数ペア:

[(1, 20647600), (2, 10323800), (4, 5161900), (5, 4129520), (8, 2580950), (10, 2064760), (16, 1290475), (20, 1032380), (25, 825904), (40, 516190), (41, 503600), (50, 412952), (80, 258095), (82, 251800), (100, 206476), (164, 125900), (200, 103238), (205, 100720), (328, 62950), (400, 51619), (410, 50360), (656, 31475), (820, 25180), (1025, 20144), (1259, 16400), (1640, 12590), (2050, 10072), (2518, 8200), (3280, 6295), (4100, 5036)]